I did some tests, initially with intense-x the reason for the huge nexus is the models of the player and enemies, they have 1800 frames of animation. Could this be an A7 bug I remember there was a problem with bones recently found, causing large nexus requirements. Although these models have vertex animation, as soon as you add them to a project the nexus requirements go through the roof.

I'm only reporting what fixed the problem. I don't know if it's intense-x or A7's problem. But the problem with bones and models and nexus leads me possibly to think A7 also has issues with vertex animations and large amounts of animation frames.

Jethro.